Home / 120,606.33-180,884.10-77,783.49

Finding the Fourth Proportional to 120,606.33, 180,884.10 and 77,783.49

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Solution

The fourth proportional to 120,606.33, 180,884.10 and 77,783.49 is: 116,658.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,606.33 : 180,884.10 = 77,783.49 : x
  2. Step 2: Convert to fraction form
    120,606.33/180,884.10 = 77,783.49/x
  3. Step 3: Cross multiply
    120,606.33x = 180,884.10 × 77,783.49
  4. Step 4: Simplify right side
    120,606.33x = 14,069,796,875.20
  5. Step 5: Solve for x
    x = 14,069,796,875.20/120,606.33
  6. Step 6: Final answer
    x = 116,658.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.